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相关概念视频

Bonferroni Test01:10

Bonferroni Test

2.7K
The Bonferroni test is a statistical test named after Carlo Emilio Bonferroni, an Italian mathematician best known for Bonferroni inequalities. This statistical test is a type of multiple comparison test to determine which means are different than the rest. Bonferroni test can minimize the Type 1 error by reducing the significance level alpha, which otherwise increases with sample pairs.
The means of different samples are first paired in all possible combinations.
The null hypothesis of the...
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Multiple Comparison Tests01:13

Multiple Comparison Tests

3.9K
Multiple comparison test, abbreviated as MCT, is a post hoc analysis generally performed after comparing multiple samples with one or more tests. An MCT will help identify a significantly different sample among multiple samples or a factor among multiple factors.
It would be easy to compare two samples using a significance alpha level of 0.05. In other words, there is only one sample pair to be compared. However, it would be difficult to identify a significantly different sample if the number...
3.9K
Testing a Claim about Population Proportion01:24

Testing a Claim about Population Proportion

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A complete procedure for testing a claim about a population proportion is provided here.
There are two methods of testing a claim about a population proportion: (1) Using the sample proportion from the data where a binomial distribution is approximated to the normal distribution and (2) Using the binomial probabilities calculated from the data.
The first method uses normal distribution as an approximation to the binomial distribution. The requirements are as follows: sample size is large...
3.3K
Expected Frequencies in Goodness-of-Fit Tests01:19

Expected Frequencies in Goodness-of-Fit Tests

2.5K
A goodness-of-fit test is conducted to determine whether the observed frequency values are statistically similar to the frequencies expected for the dataset. Suppose the expected frequencies for a dataset are equal such as when predicting the frequency of any number appearing when casting a die. In that case, the expected frequency is the ratio of the total number of observations (n)  to the number of categories (k).
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Friedman Two-way Analysis of Variance by Ranks01:21

Friedman Two-way Analysis of Variance by Ranks

180
Friedman's Two-Way Analysis of Variance by Ranks is a nonparametric test designed to identify differences across multiple test attempts when traditional assumptions of normality and equal variances do not apply. Unlike conventional ANOVA, which requires normally distributed data with equal variances, Friedman's test is ideal for ordinal or non-normally distributed data, making it particularly useful for analyzing dependent samples, such as matched subjects over time or repeated measures...
180
One-Way ANOVA: Equal Sample Sizes01:15

One-Way ANOVA: Equal Sample Sizes

3.3K
One-Way ANOVA can be performed on three or more samples with equal or unequal sample sizes. When one-way ANOVA is performed on two datasets with samples of equal sizes, it can be easily observed that the computed F statistic is highly sensitive to the sample mean.
Different sample means can result in different values for the variance estimate: variance between samples. This is because the variance between samples is calculated as the product of the sample size and the variance between the...
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相关实验视频

Updated: Jun 22, 2025

A Psychophysics Paradigm for the Collection and Analysis of Similarity Judgments
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A Psychophysics Paradigm for the Collection and Analysis of Similarity Judgments

Published on: March 1, 2022

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局限结果得分分析中的概率比较必须内部一致.

Chuanpu Hu1

  • 1Bristol Myers Squibb, 3551 Lawrenceville Rd, Lawrence Township, NJ, 08540, USA. chuanpu.hu@bms.com.

Journal of pharmacokinetics and pharmacodynamics
|July 5, 2024
PubMed
概括

临床试验中的有限结果得分 (BOS) 存在独特的分析挑战. 本评论阐明了用于评估BOS数据的药量计方法,确保准确的模型比较和分析.

科学领域:

  • 制药指标 (Pharmacometrics) 是一个指标.
  • 临床试验分析
  • 统计建模 统计建模

背景情况:

  • 临床试验的终点经常使用局限结果得分 (BOS),这些是有限间隔内具有限制值的变量.
  • 现有的分析方法经常将BOS数据分类为连续的,分类的或混合的,导致潜在的混.
  • BOS数据的双重性质使药量计模型评估和概率比较变得复杂.

研究的目的:

  • 澄清边界结果得分 (BOS) 的药量分析中的基本问题.
  • 为指导在临床试验中对BOS数据进行适当的模型评估和数据概率比较.
  • 为了减少涉及具有限制值的变量在药量测量分析中的混乱.

主要方法:

  • 本评论回顾了用于分析有限结果得分的常见药量计方法.
  • 它讨论了将BOS数据视为连续,分类或混合的含义.
  • 文本阐明了模型评估的适当领域以及比较数据概率的条件.

主要成果:

  • 有限结果得分 (BOS) 显示连续变量和分类变量的特征.
  • 对BOS数据的误解可能导致在药量计学中不适当的模型选择和评估.
  • 更清楚地了解BOS数据属性对于准确的临床试验终点分析至关重要.
关键词:
离散变量是一个独立的变量.分发方式 分发方式 分发方式信息标准 信息标准模型的选择,零膨胀.

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An R-Based Landscape Validation of a Competing Risk Model
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An R-Based Landscape Validation of a Competing Risk Model

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A Two-interval Forced-choice Task for Multisensory Comparisons

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相关实验视频

Last Updated: Jun 22, 2025

A Psychophysics Paradigm for the Collection and Analysis of Similarity Judgments
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A Psychophysics Paradigm for the Collection and Analysis of Similarity Judgments

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结论:

  • 药量测量分析需要仔细考虑结果得分的有限性.
  • 适当的模型评估和概率比较方法对于有效的临床试验结果至关重要.
  • 这项工作有助于对边界结果得分进行更严格,更准确的药理学分析.